What's the best way to keep my cat cool?

I asked this a few weeks ago, just wanted to see if anyone else had other advice. I live in Maryland and we are getting ready for a few 100 degree days. I keep the windows in the house open about 3 inches, we have burglar latches. Also the cat got shaved, keep the lights off, he has 3 waters bowls, 3 fans running. The a/c is off when we go to work but all the windows stay open. Any other ideas on how to keep the cat cool during the heat?